Your Steering Wheel is Dirtier than a Toilet

The average steering wheel is four times dirtier than a public toilet seat, according to a new study that measures germs in cars.

Car Rental commissioned the study, which surveyed 1,000 drivers to see how often they vacuum and sanitize the inside of their vehicles. “The findings are pretty scary,” they said.

Here’s a quick rundown:

50% of drivers neglect to clean their car interiors on a regular basis.

32% of drivers only clean their interiors once a year.

12% of drivers never clean their interiors at all.

Dirtier than a public toilet

The study found there are roughly 700 different strains of bacteria living in the average car, exposing our immune systems to diseases and ailments.

To illustrate how dirty car interiors are, researchers measured the average amount of bacteria per square centimeter, or colony-forming units (CFU), on a range of interior surfaces. Then they compared them to public surfaces we touch every day.

They found that the average steering wheel has 629 CFU per square centimeter, which is:

Six times dirtier than an average cell phone screen at 100 CFU

Four times dirtier than a public toilet seat at 172 CFU

Two times dirtier than public elevator buttons at 313 CFU

Other filthy interior components include the area inside the door handle, cup holder, gear shifter, seat belt and radio volume button.

Two of the most common strains of bacteria found on these surfaces are Staphylococcus and Propionibacterium. These bacteria cause food poisoning, skin infections, MRSA, inflammation and infection.